CN113839206B - Multipath trigger pulse control system - Google Patents
Multipath trigger pulse control system Download PDFInfo
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- CN113839206B CN113839206B CN202111105896.6A CN202111105896A CN113839206B CN 113839206 B CN113839206 B CN 113839206B CN 202111105896 A CN202111105896 A CN 202111105896A CN 113839206 B CN113839206 B CN 113839206B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2682—Time delay steered arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2676—Optically controlled phased array
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Abstract
The invention relates to the technical field of synchronous control, in particular to a multipath trigger pulse control system. The system comprises a control signal generator, a communication interface 1, a communication interface 2, a delay control module, an optical transmitting module, a wavelength division multiplexer, an optical splitter and N identical sub-paths connected behind the optical splitter, wherein each sub-path corresponds to a radiation unit in an antenna array system, and the sub-paths realize the triggering of the radiation unit and the adjustment of the delay of signals. N sub-paths are respectively arranged in the shielding structures with corresponding numbers, and each sub-path comprises a wavelength division multiplexer, a signal processing module and an output end. The invention has the advantages that the signal processing of the signal processing module is performed, the leading edge time of the output signal is short, and the amplitude is high; the front-end delay control module and the rear-end singlechip are combined, so that the control signal generator can carry out delay adjustment on each path of signal, and the synchronous control precision of the system is improved; and the system has strong expandability, and the number of the terminal paths can be expanded according to the actual use requirement.
Description
Technical Field
The invention relates to the technical field of synchronous control, in particular to a multipath trigger pulse control system.
Background
In the process of large-scale array antenna array, a trigger pulse control system mainly provides high-precision trigger signals for all radiation units. The array antenna space power synthesis method mainly can achieve the functions of improving the array antenna space power synthesis efficiency, controlling the space scanning of the array antenna, improving the array output repetition frequency, changing the output pulse width parameters and the like.
Because of the large array scale, the trigger signal needs to be transmitted remotely; when the whole array system operates, hundreds of units work simultaneously, and the synchronous trigger control system needs to work under a strong electromagnetic environment. The traditional trigger pulse control system is realized based on an FPGA, in the design and realization of a multi-channel discrete data and image data high-speed synchronous acquisition and analysis system, an author aims at synchronously controlling various experimental devices in the rocket engine test process, a set of multi-channel high-speed experimental synchronous hardware is designed based on the FPGA, and synchronous control of 8 paths of input signals and 8 paths of level output signals is realized. The traditional trigger pulse control system has long signal front time and low amplitude, the signal transmission usually adopts a shielding coaxial cable as a transmission medium, the number of controllable units is small, and the controllable units are generally several units or more than ten units, so that the expandability of the system is poor; when signals are transmitted in a long distance, the signals are distorted, the front edge is slowed down, the amplitude is reduced and the like due to the adoption of cable transmission; when the array system operates, tiny flaws of the cable affect shielding effectiveness and signal transmission.
Disclosure of Invention
The invention aims to provide a multipath trigger pulse control system, which solves the technical problems of limited number of control units, signal distortion during long-distance transmission and poor electromagnetic interference resistance of the existing system.
In order to achieve the above purpose and solve the above technical problems, the technical scheme of the invention is as follows:
A multipath trigger pulse control system comprises a control signal generator, a communication interface 1, a communication interface 2, a delay control module, an optical transmitting module, a wavelength division multiplexer and an optical splitter;
The optical splitter is connected with N identical sub-paths 1,2 … N, each corresponding to a radiation unit in the antenna array system, and the sub-paths realize the adjustment of the triggering of the radiation unit and the delay of the signal. In the antenna array system, each radiating element often needs to adjust the position, and through the one-to-one combination mode of the sub-paths and the radiating elements, the position of each element of the system is conveniently adjusted, and the system adjustment flexibility is strong. N sub-paths are respectively placed in shielding structures with corresponding numbers, and each sub-path comprises a wavelength division multiplexer, a signal processing module and an output end; the signal processing module comprises a photoelectric conversion circuit 1, a photoelectric/electric conversion circuit 2, a singlechip, a front edge sharpening circuit, a delay unit and an amplitude amplifying circuit, wherein electric signals are used for transmission among the parts of the signal processing module, and when the antenna array system operates, the signal processing module is easily interfered by a strong electromagnetic environment, so that each sub-path is placed in a shielding structure and is used for shielding the interference of the strong electromagnetic environment. The singlechip codes according to the sub-paths, so that the delay control signals are conveniently addressed according to the codes, and the delay control signals are used for realizing delay adjustment of signals of specific sub-paths;
The control signal generator is communicated with the light emitting module through the communication interface 1 and is used for realizing pulse triggering mode selection, pulse parameter modification, information display and monitoring of the working state of the light emitting module;
The control signal generator is communicated with the delay control module through the communication interface 2 and is used for realizing delay time setting and monitoring the working state of the delay control module;
the output end of the light emitting module is connected with the input end of the wavelength division multiplexer through an optical fiber; the output end of the delay control module is connected with the other input end of the wavelength division multiplexer through an optical fiber;
The output end of the wavelength division multiplexer is connected with the input end of the optical splitter through an optical fiber;
The output end of the optical divider is connected with the input end of the wavelength division multiplexer of each sub-path through optical fibers;
One path of output end of the wavelength division multiplexer is connected with the input end of the photoelectric conversion circuit 1 of the signal processing module; the output end of the photoelectric conversion circuit 1 is connected with the input end of the front edge sharpening circuit; the output end of the front edge sharpening circuit is connected with the input end of the delay unit;
The other output end of the wavelength division multiplexer is connected with the input end of the photoelectric/electro-optical conversion circuit 2 of the signal processing module; the output end of the photoelectric/electro-optical conversion circuit 2 is connected with the input end of the singlechip;
The output end of the singlechip is connected with the control input end of the delay unit, and the output end of the delay unit is connected with the input end of the amplitude amplifying circuit; the output end of the amplitude amplifying circuit passes through the shielding structure and outputs signals to the outside.
The effective benefits of the invention are as follows:
1. The invention has the advantages that the signal processing of the signal processing module is performed, the leading edge time of the output signal is short, and the amplitude is high; the front-end delay control module and the rear-end singlechip are combined, so that the control signal generator can carry out delay adjustment on each path of signal, and the synchronous control precision of the system is improved; and the system has strong expandability, and the number of the terminal paths can be expanded according to the actual use requirement.
2. The system has simple structure, and realizes the functions of triggering and delay adjustment through one optical fiber passage.
Drawings
FIG. 1 is a schematic diagram of a trigger pulse control system according to the present invention;
FIG. 2 is a schematic diagram of a signal processing module according to the present invention;
Fig. 3 is a schematic diagram of the sub-path 1 of the present invention.
Detailed Description
The foregoing and other features, aspects and advantages of the invention will become more apparent from the following detailed description of the embodiments with reference to the accompanying drawings 1-3. The following examples are all referred to in the specification and drawings.
The invention is further described below with reference to the drawings and examples.
The system structure block diagram of the multi-channel trigger pulse control system is shown in figure 1, and mainly comprises a control signal generator, a communication interface 1, a communication interface 2, a delay control module, an optical transmitting module, a wavelength division multiplexer and an optical splitter, wherein the optical splitter is connected with N identical sub-channels and numbered from 1,2,3, N sub-channels are respectively placed in metal shielding boxes with corresponding numbers, as shown in figure 3, each sub-channel comprises the wavelength division multiplexer, a signal processing module and an output end, and the codes of the multiplexer, the signal processing module and the output end in each sub-channel are consistent with the codes of the sub-channels, and the codes of the sub-channels are numbered. The signal processing modules are shown in fig. 2, and mainly comprise a photoelectric conversion circuit 1, a photoelectric/photoelectric conversion circuit 2, a singlechip, a front edge sharpening circuit, a delay unit and an amplitude amplifying circuit, wherein the singlechip on each signal processing module encodes according to the sub-path where the singlechip is located, and delay control signals can address according to the encoding to realize delay adjustment of signals of the designated sub-path. According to the multipath trigger pulse control system, each path of signal is transmitted through the optical fiber, the electromagnetic interference resistance of the optical fiber is strong, the attenuation is small, and the problems of mutual coupling between signals in the transmission process, distortion of the signals in the long-distance transmission process and the like are avoided;
Taking a sub-path 1 as an example, the working process and the delay adjusting method of the multi-path trigger pulse control system are described;
The control signal generator is communicated with the light emitting module through the communication interface 1 and is used for realizing the functions of pulse triggering mode selection, pulse parameter modification, information display, working state monitoring of the light emitting module and the like;
The control signal generator is communicated with the delay control module through the communication interface 2 and is used for realizing delay time setting and monitoring the working state of the delay control module;
step 1, a control signal generator sends a path of laser control signal, an optical emission module sends a path of optical trigger signal with lambda 1 wavelength after receiving the laser control signal, and the signal is transmitted through an optical fiber with the number of 0-1;
Step 2, the control signal generator sends a delay control signal of a sub-path 1, the signal is provided with a code of the sub-path 1, after receiving the delay control signal, the delay control module sends an optical delay signal with a lambda 2 wavelength, the signal is provided with the code of the sub-path 1, and the signal is transmitted through an optical fiber with the number of 0-2;
Step 3, combining an optical trigger signal with the wavelength of lambda 1 and an optical delay signal with the wavelength of lambda 2 into one path of optical signal through a wavelength division multiplexer, transmitting the optical signal through an optical fiber with the number of 0-3, and dividing the optical signal into multiple paths of sub-signals through an optical divider;
step 4, the sub-signal 1 is transmitted through an optical fiber with the number of 1-1, and is divided into optical signals with two wavelengths of lambda 1 and lambda 2 through a wavelength division multiplexer 1;
Step 5, after the lambda 2 wavelength signal is transmitted through the optical fiber with the number of 1-2, the signal is converted into an electric delay signal through the photoelectric/electro-optical conversion circuit 2, the electric delay signal is received by the singlechip and then acts on the control end of the delay unit to finish the set time delay, and after the singlechip executes the delay instruction, the singlechip sends an electric delay feedback signal which is converted into an optical delay feedback signal with the lambda 3 wavelength through the photoelectric/electro-optical conversion circuit 2;
step 6, after being transmitted by optical fibers with the number of 1-3, the lambda 1 wavelength signal is converted into an electric signal by a photoelectric conversion circuit 1, the electric signal is converted into a path of fast-forward signal by a forward sharpening circuit, and the fast-forward signal is delayed by a delay unit and then is output into a path of trigger pulse signal by an amplitude amplifying circuit;
Step 7, optical delay feedback signals with lambda 3 wavelength are transmitted to a delay control module through optical fiber 1-2, wavelength division multiplexer 1, optical fiber 1-1, optical splitter, wavelength division multiplexer 0 and optical fiber 0-2 paths, the delay control module receives the feedback signals and transmits the feedback signals to a control signal generator through a communication interface 2, and the control signal generator displays information that the delay setting of a sub-path 1 is successful;
here, each sub-path receives an optical delay signal with a wavelength of lambda 2, the lambda 2 wavelength optical delay signal is encoded by a singlechip of the sub-path 1, only the sub-path 1 carries out corresponding delay, and other sub-paths do not carry out delay;
step 8, repeating the steps 1-7, and carrying out delay adjustment on signals of the sub-path 2 and the sub-path 3.
Changing the number of the rear terminal ways according to actual use requirements;
When the system operates, the control signal generator controls the light emitting module to send one path of lambda 1 wavelength light signal, N sub paths all receive the signal, and the N sub paths output N paths of trigger pulse signals after the signals of the N sub paths pass through the photoelectric conversion circuit, the front edge sharpening circuit, the delay unit and the amplitude amplifying circuit of the corresponding sub paths.
Therefore, the signal conversion and output of each path are completed at the tail end of the system, the photoelectric conversion circuit is provided with a certain range of optical power receiving interval, and the photoelectric conversion circuit can perform normal photoelectric conversion on the received optical signals in the range of the optical power receiving interval. The problem that signals cannot be converted due to attenuation of optical signals in the transmission process and the problem that individual unit signals cannot be output due to inconsistent attenuation of all transmission channels are avoided, and the stability and the reliability of the system are improved;
the above is only a preferred embodiment of the present invention, and it should be noted that the above-described preferred embodiment should not be construed as limiting the present invention. Any improvements, modifications, equivalents, and so forth that do not depart from the spirit and scope of the invention are intended to be within the scope of the invention.
Claims (2)
1. The multipath trigger pulse control system is characterized by comprising a control signal generator, a first communication interface, a second communication interface, a delay control module, an optical emission module, a wavelength division multiplexer and an optical splitter;
The optical splitter is connected with N identical first sub-paths, N identical second sub-paths … … and N sub-paths, the N sub-paths are respectively placed in shielding structures with corresponding numbers, and each sub-path comprises a wavelength division multiplexer, a signal processing module and an output end; the signal processing module comprises a first photoelectric conversion circuit, a second photoelectric/photoelectric conversion circuit, a singlechip, a front edge sharpening circuit, a delay unit, an amplitude amplifying circuit and a singlechip, wherein the singlechip codes according to a sub-path;
the control signal generator is communicated with the light emitting module through a first communication interface and is used for realizing pulse triggering mode selection, pulse parameter modification, information display and monitoring of the working state of the light emitting module;
the control signal generator is communicated with the delay control module through a second communication interface and is used for realizing delay time setting and monitoring the working state of the delay control module;
The output end of the light emitting module is connected with the input end of the wavelength division multiplexer through an optical fiber; the output end of the delay control module is connected with the other input end of the wavelength division multiplexer through an optical fiber;
The output end of the wavelength division multiplexer is connected with the input end of the optical splitter through an optical fiber;
The output end of the optical divider is connected with the input end of the wavelength division multiplexer of each sub-path through optical fibers;
one path of output end of the wavelength division multiplexer is connected with the input end of the first photoelectric conversion circuit of the signal processing module; the output end of the first photoelectric conversion circuit is connected with the input end of the front edge sharpening circuit; the output end of the front edge sharpening circuit is connected with the input end of the delay unit;
the other output end of the wavelength division multiplexer is connected with the input end of the second photoelectric/electro-optical conversion circuit of the signal processing module; the output end of the second photoelectric/electro-optical conversion circuit is connected with the input end of the singlechip;
The output end of the singlechip is connected with the control input end of the delay unit, and the output end of the delay unit is connected with the input end of the amplitude amplifying circuit; the output end of the amplitude amplifying circuit passes through the shielding structure and outputs signals to the outside;
When the multi-path trigger pulse control system operates, the control signal generator controls the light emitting module to send a path of lambda 1 wavelength light signal, N sub paths all receive the signal, and the N sub paths output N paths of trigger pulse signals after the signals of the N sub paths pass through the photoelectric conversion circuit, the front edge sharpening circuit, the delay unit and the amplitude amplifying circuit of the corresponding sub paths.
2. A method for delay adjustment using the multiple trigger pulse control system of claim 1, wherein the delay adjustment of the first sub-path comprises the steps of:
step 1, a control signal generator sends a path of laser control signal, an optical emission module sends a path of optical trigger signal with lambda 1 wavelength after receiving the laser control signal, and the signal is transmitted through an optical fiber with the number of 0-1;
step 2, a control signal generator sends a delay control signal of a first sub-path, the signal is provided with a code of the first sub-path, after receiving the delay control signal, a delay control module sends an optical delay signal of lambda 2 wavelength, the signal is provided with the code of the first sub-path, and the signal is transmitted through an optical fiber with the number of 0-2;
Step 3, combining the optical trigger signal with the wavelength of lambda 1 and the optical delay signal with the wavelength of lambda 2 into one path of optical signal through a wavelength division multiplexer with the number of 0, transmitting the optical signal through an optical fiber with the number of 0-3, and dividing the optical signal into multiple paths of sub-signals through an optical divider;
Step 4, the sub-signal 1 is transmitted through the optical fiber with the number of 1-1, and is divided into optical signals with the wavelength of lambda 1 and lambda 2 through the wavelength division multiplexer with the number of 1;
Step 5, after the lambda 2 wavelength signal is transmitted through the optical fiber with the number of 1-2, the signal is converted into an electric delay signal through a second photoelectric/electro-optical conversion circuit, the electric delay signal is received by the singlechip and then acts on the control end of the delay unit to finish the set time delay, and after the singlechip executes the delay instruction, the singlechip sends an electric delay feedback signal which is converted into an optical delay feedback signal with the lambda 3 wavelength through the second photoelectric/electro-optical conversion circuit;
Step 6, after being transmitted by optical fibers with the number of 1-3, the lambda 1 wavelength signal is converted into an electric signal by a first photoelectric conversion circuit, the electric signal is converted into a path of fast-forward signal by a forward sharpening circuit, and the fast-forward signal is delayed by a delay unit and then is output into a path of trigger pulse signal by an amplitude amplifying circuit;
Step 7, optical delay feedback signals with lambda 3 wavelength are transmitted to a delay control module through an optical fiber 1-2, a wavelength division multiplexer with the number of 1, an optical fiber 1-1, an optical splitter, a wavelength division multiplexer with the number of 0, an optical fiber 0-2 path, the delay control module receives the feedback signals and then transmits the feedback signals to a control signal generator through a second communication interface, and the control signal generator displays the successful information of the delay setting of the first sub-path;
Here, each sub-path receives an optical delay signal with a wavelength of lambda 2, the lambda 2 wavelength optical delay signal is encoded by a single chip microcomputer of a first sub-path, only the first sub-path carries out corresponding delay, and other sub-paths do not carry out delay;
And 8, repeating the steps 1-7, and carrying out delay adjustment on signals of the second sub-path and the third sub-Lu. Nth sub-path.
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